This page describes how to migrate from Bitbucket Server 6.x to 7.0. Release 220.127.116.11-p5 is the first release that is compatible with Bitbucket Server 7.0 onwards.
If you have any issues please contact us via our Service Desk.
At the time of writing, the official page explaining the upgrade procedure is here which we recommend you read before upgrading.
How to Upgrade
First you should create a clone of your production system that you can do a practice upgrade on. There is an Atlassian knowledge base article about creating a staging system here.
Once you have the staging system created, upgrade it to Bitbucket Server 7. Then install the ScriptRunner plugin.
The static type checker available in ScriptRunner for Bitbucket Server should be able to indicate problems quite quickly.
You should open each admin page that lists each extension point, eg pre-receive hooks, listeners etc. Look for code highlighted with red errors, fix them and check that the script shows the green dot of successful compilation.
If practical, test your most important scripts and conditions in your staging server.
Finally, make sure that your maintenance window includes enough time to do your production upgrade, and then the modifications to the scripts that you have already tested in your staging server.